I've created a field that is specific to a single pipeline however it is appearing in all the other pipelines and I can't see anywhere to hide it? 

For example - if I have a pipeline about car repairs - I need fields for make and model, but if my other pipeline is about window installation in houses - then I don't need to see these fields!

I've ticked the 'important' option for the one pipeline, but it is still appearing in the other pipelines.

Any help is appreciated